A) Anthrax is a bacterial disease that affects humans and cattle.
B) Rust of wheat is a fungal disease that spread by air.
C) Citrus canker is a viral disease that affects citrus fruits.
D) Yellow vein mosaic is a viral disease that affects bhindi.
Correct Answer: C
Solution :
Citrus canker, a disease that affects citrus fruits, is caused by the bacterium Xanthomonas species. Infection causes lesions on the leaves, stems and fruits of citrus trees, e.g. lemon, oranges and grapes.
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